ML20117P446

Proposed Tech Specs Re Containment Purge Valves W/Resilient Seals on Performance Based Leakage Testing Frequency

ML20117P446
Person / Time
Site:	Grand Gulf
Issue date:	09/19/1996
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20117P444	List: ML20117P442 ML20117P446
References
NUDOCS 9609230278
Download: ML20117P446 (3)

Text

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. PCIVs l 3.6.1.3 l

~

SUR0EILLANCEREQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.6.1.3.3 ------------------NOTES------------------

1. Valves and blind flanges in high radiation areas may be verified by use of administrative means.

2. Not required to be met for PCIVs that are open under administrative controls.

Verify each primary containment isolation Prior to manual valve and blind flange that is entering MODE 2 located inside primary containment, or 3 from drywell, or steam tunnel and is required MODE 4, if not to be closed during accident conditions performed is closed. within the previous 92 days

! SR 3.6.1.3.4 Verify the isolation time of each power In accordance 4 operated and each automatic PCIV, except with the

MSIVs, is within limits. Inservice Testing Program j

SR 3.6.1.3.5 ------------------NOTE-------------------

Only required to be met in MODES 1, 2, and 3. r

................... ..................... I LSc.c\ /

/ 3,G"M Perform leakage rata testing for each 1 ys 4

- primary containment purge valve with resilient seals.

e wit  !

92 s aft 1

(continued) i GRAND GULF 3.6-15 Amendment No. 120 I

96o9230278 960919 PDR ADOCK 05000416_

p PDR

, , PCIVs B 3.6.1.3

. . [1ASES SURVEILLANCE SR 3.6.1.3.5 (continued)

REQUIREMENTS For primary containment purge valves with resilient seals, additional leakage rate testing beyond the test requirements of 10 CFR 50, Appendix J (Ref. 3), is required to ensure

, OPERABILITY. Operating experience has demonstrated that

this type of seal has the potential to degrade in a shorter 2

time period than do other seal types. Based on this  !

observation, and the importance of maintaining this l penetration leak tight (due to the direct path between

rimary_ containment and the environment), a requency o

Ta~ys was established. Additi na y, is n muri. oe f i performed within 92 days after opening the valve. The

i 92 day Frequency was chosen recognizing that cycling the

t valve could introduce additional seal degradation (beyond

, that which occurs to a valve that has not been opened).

L Thus, decreasing the interval (from 184 days) is a prudent h after a valve has been opened.

! The SR is modified by a Note stating that the primary containment purge valves are only required to meet leakage rate testing requirements in MODES 1, 2, and 3. If a LOCA inside primary containment occurs in these MODES, purge

!' valve leakage must be minimized to ensure offsite j radiological release is within limits. At other times when the purge valves are required to be capable of closing

] (e.g., during handling of_ irradiated fuel), pressurization e

concerns are not present and the ppge valves are not j required to meet any specific leakage criteria.

% sert A 3.(,-ay19 SR 3.6.1.3.6 1 J Verifying that the full closure isolation time of each MSIV is within the specified limits is required to demonstrate OPERABILITY. The full closure isolation time test ensures that the MSIV will isolate in a time period that does not exceed the times assumed in the DBA analyses. The 3 second time limit is measured from the start of valve motion to complete valve closure. The 5 second time limit is measured from initiation' of the actuating signal to complete valve closure. The Frequency of this SR is in accordance with the Inservice Testing Program.

(continued)

GRAND GULF B 3.6-24 Revision No. I

PCIVs

'4 8 3.6.1.3

~ BAS'ES ACTIONS D.1, 0.2, and 0.3 (continued) verification that those isolation devices outside primary containment and potentially capable of being mispositioned are in the correct position. For the isolation devices inside primary containment, the time period specified as

" prior to entering MODE 2 or 3, from MODE 4 if not performed within the previous 92 days" is based on engineering judgment and is considered reasonable in view of administrative controls that will ensure that isolation device misalignment is an unlikely possibility.

For the primary containment purge valve with resilient seal that is isolated in accordance with Required Action D.1, SR 3.6.1.3.5 must be performed at least once every 92 days.

This providas assurance that degradation of the resilient seal is detected and confirms that the leakage rate of the primary containment purge valve does t nerease durino the timeJJLe ion is lated. he normal reiuency for1 CTR 3.6 is 18 _

' nce more relianfi is pTacird on a si e valve while in this Condition, it is prudent to perform the SP more often. Therefore, a Frequency of once l per 92 days wu chosen and has been shown acceptable based on operating experience. 1 E.1 and E.2

~

If any Required Action and associated Completion Time cannot be met in MODE 1, 2, or 3, the plant must be brought to a MODE in which the LCO does not apply. To achieve this status, the plant must be brought to at least MODE 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and to MODE 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed ,

Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.

F.1, G.1, H.1, and H.2 If any Required Action and associated Completion Tirne cannot be met, the plant must be placed in a condition in which the LC0 does not apply. If applicable, CORE ALTERATIONS and movement of irradiated fuel assemblies in the primary and (continued)

GRAND GULF B 3.6-20 Revision No. O

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